Won't Go!

1973-1980 : 280S, 280SE, 280SEL, 300SD, 350SE, 350SEL, 450SE, 450SEL, 450SEL 6.9
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Scotty H
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Model you own: w116

Won't Go!

Post by Scotty H » Fri 06 Nov, 2015 7:43 pm

Hello All

My lovely and much loved 280SEL has failed to proceed. Recently it has a very intermittent fault where it just cuts out electrically ( and the lights go out ), but would start again seconds later. I thought it might be connected to the other (very) intermittent fault; that of the gear lever needing a gentle touch to properly engage park before starting. Are these two linked? It sits untouched and alone and work demands necessitate me being absent from the garage. It has just been serviced, has a new battery (and other work), so I am at a loss. Help!!!

Scotty

brother benz68
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Re: Won't Go!

Post by brother benz68 » Fri 06 Nov, 2015 7:52 pm

Hi Scotty,

is the gear lever vague and loose, if so the plastic linkage bushes are worn and need replacing. There are 2 of them I believe. Parts are cheap. If this is the case I would bet that this is your problem as the car will not start if it isn't properly in PARK.

I maybe off here as I'm no real expert but maybe another member may confirm my theory.

All the best

Craig

CraigB
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Re: Won't Go!

Post by CraigB » Fri 06 Nov, 2015 8:24 pm

If your lights are going out i don't think it is the gear lever thing, although that could be another thing. I suggest put your lights on and then start moving things like the battery leads and see what happens. If motor and lights are cutting out i would suspect battery leads, given it is a new battery - they can break down within the insulation. If you can't get your lights on at all, get jumper leads and go battery to a good earth like the motor - positive terminal to something like where that big lead goes to starter etc. - I just say that because it sounds like multiple things all going at once.
Craig Baulderstone
Lurch
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Chai
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Re: Won't Go!

Post by Chai » Fri 06 Nov, 2015 9:49 pm

If the lights go off when the engine stops, agree the first thing to do is to check are loose electrical connections to the positive or negative cable to the battery.
The use of jumper leads is a good idea to confirm the existing electrical cables are not breaking up internally.

As the battery has been replaced and the symptoms persist, it's not a faulty battery.
If the lights still go off, spin all the fuses around to ensure there's no corrosion at the fuse connector ends.
Chai
1974 450SLC

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AMG
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Re: Won't Go!

Post by AMG » Fri 06 Nov, 2015 9:50 pm

Sounds like some basic general maintenance is required.

cleaning and lubrication of all electrical contacts & switchgear, new shifter linkage bushes, check the reverse lockout switch function (on side of gearbox) check the fuel pump relay for dry joints (if it's a K-jet). check the fuses for clean contacts and viable fuse material. check alternator / regulator for correct function, check ignition switch contacts, check earth straps, check battery cable & fusible links.

That's where I'd start. From there, each individual circuit may require testing, but unless I'm standing right infront of a car, I won't attempt to make any definitive statement as to what exactly your stalling issue is.
However, in the above, several problem areas relating to stalling and starting issues are covered. Make sure you at the very least check the reverse lockout (start inhibitor switch), and it's wiring. Fuel pump relay innards on kjet are a bugger and contribute to hot stalling and random loss of electricals.
Voltage regulator and alternator circuits can fail under load conditions and in the engine bay, you want to make sure every single connector is thoroughly clean and free of verdigris and tarnish, and is appropriately lubricated with switchlube.
There are many other possibilities, but firstly, ensuring the systems are functioning correctly and that components are clean and operating as intended is the first step towards diagnosing (and eliminating) the problem.
Current:
1987 560SL 4sp. auto Signalrot "Stella"
1987 190E 2.3-16 5sp. man. Blauschwarz "Hermann"
1992 300CE-24 6sp. man. Perlblau / Iceblau "Gretel"
1992 Range Rover Vogue SE 4sp auto Ardenne Green "Oswald"
2012 Renault Sport Megane RS265 Trophy 8:08 6 sp. man. Liquid Yellow "Jean Rédélé"
Previous:
1986 560SEL Anthracitgrau "Schultz" - In Mercedes Heaven
1987 190E 2.6 4sp. auto Signalrot "Sabine" - which now resides/owns Andrew M's Garage
1972 350SLC Astralsilber "Lurch" - now in the loving care of Craig B
1989 2.5-16 Blauschwarz 4sp. auto (parted) formerly owned by Derek/Hasan.

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TheMadRacoon
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Re: Won't Go!

Post by TheMadRacoon » Fri 06 Nov, 2015 11:22 pm

If it's D-jet it may pay to check power to the ECU. Could be a loose or poor connection.
Emad,
TheMadRacoon
1975 350SLC Astral Silver (725) / Blue (2012, 284,900 km - present.... a real Benz, getting better and better)
1988 190E Deep Blue (900) / Cream (2006, 190,000 km - 2007, ~ 215,000 km .... FSH and still spent big $$$)
1974 280E Reed Green (860) / Bone (1993, 316,700 km - 2004, ~490,000 km and still A1)

Scotty H
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Re: Won't Go!

Post by Scotty H » Sun 08 Nov, 2015 3:32 pm

Thank you all for these great replies. Hopefully it's not all that involved but now I know where to start.

Very much appreciated

Scotty

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